I left Economy Energy in April (2018), paid my outstanding gas bill (thinking it was correct by looking at the reading numbers), but the final electricity bill was clearly wrong, from credit went to debit, after providing the final reading, that it was a lower number than the estimated. Since then I have been calling and emailing, and time after time they/software fails to generate the correct bill. So I decided to make a manual calculation, from the day I join to the day I left, with the overall consumption and with all the direct debit paid into it, and I was astonished to realize that not only they are owing more than expected on the electrical bill, but also the gas bill is incorrect. This means that somewhere in between they charge me more on the gas (since the final bill seemed correct) So big advise, check your bills, don't trust their automatic software calculations!!!!! If it wasn't bad enough, every time I call I have to repeat everything all over again. They don't seem to keep on file on-going issues/discussions, nor either they communicate with different departments. I keep been harassed by their debt collection department, which is completely outrageous, they fail to correct my bill, they are OWING ME money and they keep calling me and sending me mails to collect money from me!! I keep telling them to stop, UPDATE MY FILE, and they call me twice a week?! I don't understand why it is so difficult and it takes so long to correct a bill, is a simple calculation !! I WOULD ADVISE CHECKING YOUR OVERALL CONSUMPTION AND CALCULATE YOURSELF THE VALUE. THEY CHARGE ME MORE THEN THEY SHOULD.